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Checking bean temperature in popcorn popper
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dropnbassonu
Senior Member


Joined: 25 Jun 2013
Posts: 2
Location: Winston Salem, NC
Expertise: Just starting

Drip: Chemex
Posted Sat Oct 5, 2013, 10:24pm
Subject: Checking bean temperature in popcorn popper
 

I'm trying to figure out the best way to check the surface bean temperature in my popcorn popper.  I usually go by smell and look, but I verify with my infrared gun.  Typically I'll go just after first crack ends, which usually takes ~7mins and ends up being around 430 degrees.  What I'm confused about is my gun (http://www.thermoworks.com/products/ir/irgun.html) is 12:1, meaning at 12" away it measures the temperature of a 1" diameter.  The closer I hold the gun to the beans, the higher the temp I get.  For example, if I hold the gun 12" away from the beans at the end I get a reliable 430.  Holding the gun 6" away returns a temp of 438-440.  I'm curious which one is more accurate and reliable to use.  I will say that holding it 12" away typically has first crack starting between 400-403 on almost every bean I've roasted so far.  Does that sound about right?

Thanks
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efilive
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Joined: 28 Dec 2007
Posts: 174
Location: los angeles
Expertise: I live coffee

Espresso: Expobar Brewtus II
Grinder: Macap M4D/Rocky...
Drip: capresso aroma...
Roaster: Behmor 1600
Posted Sat Oct 5, 2013, 11:36pm
Subject: Re: Checking bean temperature in popcorn popper
 

I'd guess the most important thing is consistency. Always hold it the same distance and then find the temperature at that distance that gives you the results you want.

Ira

 
The guy who wrote RoasterThing
www.RoasterThing.com
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